!rm results.eps
set terminal postscript eps enhanced
set output "results.eps"
set size 4/5., 1.5/3.
set xlabel "CPU time [minutes]"
set ylabel "Relative cost improvement [%]"

#set key 5.35,61
set key left top
#set key left bottom
#set nokey

set grid

#set pointsize 1.1

#set xtics 4,1
set ytics 0,10

plot [0:50] "5nodes.dat" with lines lt 1 lw 3 title "5 nodes",\
"7nodes.dat" with lines lt 2 lw 3 title "7 nodes",\
"9nodes.dat" with lines lt 4 lw 3 title "9 nodes"

